Coupling.



G. A. QUIN.

COUPLING.

APPLICATION FILED FEB.24,1913.

1,109,616, Patented Sept. 1, 1914.

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Specification of Letters Patent. Application. flls lebmw i 1 serlal lo.

Patented Sept. 1, 1914. 250,3 2,.

To. all whom it may camera:

Be it known that I, Gnome A. Qpm, of the city of Toronto, in the Province of Ontario, Canada, have inventedv certam new and useful Improvements in Couplings, of which-the following is a specification.

This invention relates particularly to couplings used for connecting sectional rods such. as used. for pushing electric w 1res and cables through conduits, and my ob ect is to devise a coupling which while secure is readily coupled and uncoupled, has lnterchangeable parts and possesses a certam amount of flexibility. a

I attain my object by means: of the construction hereinafter described and illustrated in the accompanying drawing in which Figure 1 is a plan view showing the parts in position for coupling or uncoupling;

Fig. 2 a plan view showing the parts coupl a a d in. alin men and ig. 3; a se elevation showing the parts in the, same position as in 2.

In the drawings like numerals of reference indicate corresponding parts in the difl'erent figures.

The coupling comprises two parts, each identical in form, so that the parts are always interchangeable. Each part comprises a body 1, formed with a socket as indicated in dotted lines to receive the end of the rod 2 or other art to be coupled. The end of the body is reduced to a thickness of one half of that of the body itself, this pr0jecting portion 3 thus leaving a shoulder 4 on the end of the body. At the end of the projecting portion 3 is formed the head 5 the thickness of which is disposed equally on each side of the plane of the face of the projecting portion 3. The head is thus connected with the body portion merely by the neck 6. In the body portion is formed a socket 7 adapted to receive the head 5 of the other half of the coupling.

As it is my object to arrange the coupling so that it may be disengaged only when the parts are at an angle to one another, as shown in Fig. 1, the inwardly directed face 8 of the head and the corresponding face 9 of the socket are curved substantially on arcs of the same circle, this circle being struck from a center at the middle of the coupling. When the coupling is in the position, shown in Figs. 2 and 3, the curved faces of heads and sockets engage to resist tensional strains tending to. separate the parts. At the same time the parts are them to or from the position shown in Fig. .1. To resist compression strains thea shoula nd9 and the ends 10 of the projecting portlons 3 are also similarly curved to engage withv them.

The sockets 7 need not closely fit the ends of the heads 5, but as it is preferable not to leave too much open space I make them a fairly snug fit to. the ends of the heads. The ends of the sockets are preferably straight, asshown, while the ends of the heads are curved concentric with the curves of the faces 8 and 9- to facilitate the heads entering the sockets when the couplings are engaged by a rocking movement as described. The coupling, it will be seen, possesses a many advantages. The parts are intersehangeable so that either end of any rods or other parts to be coupled may be engaged with either end of any other rod or part to be c'oupled. When engaged the action is cqulte secure. At the same time a certain amount of lateral flexibility is provided which is useful when the rods have to pass around slight curves. The construction is also quite cheap as the parts may be cast and Very little grinding and no machine work is required to make them fit.

What I claim as my invention is 1. A coupling formed of similar parts each comprising a body portion, a projecting portion of half the thickness of the body, a head at the end of the projecting portion having its thickness disposed equally on each side of the plane of the face of the projecting portion, and a socket formed in the body adjacent the projecting portion to receive the head of the other part of the coupling, the inwardly directed face of the head and the corresponding face of the socket being curved substantially on arcs of the same circle struck from a center at the middle of the coupling.

2. A coupling formed of similar parts ing portion of half the thickness of the body, a head at the end of the projecting portion having its thickness disposed equally on each side of the plane of the face of the projecting portion, a socket formed in the body adreadily engaged and! disengaged by turning each comprising a body portion, a projectders 4: are curved similarlg to thefaces 8 jacent the pro'ecting portion to receive the head of the ot er part of the coupling, the inwardly directed face of the head and the corresponding face of the socket being curved substantially on, arcs of the same circle struck from a center at the middle of the coupling, and the faces at the end of the projecting portion and the shoulder of the body portion also being curved on arcs of the same circle concentric with the faces of the head and socket hereinbefore referred to.

8. A coupling formed of similar parts each comprising a body portion, a projecting portion of half the thickness of the body, a head at the end of the projecting portion havin its thickness disposed equally on each side of the plane of the face of the projecting portion, a socket formed in the body adjacent the projecting portion to receive the head of the other part of the coupling, the inwardly directed face of the headand the corresponding face of the socket being curved substantially on arcs of the same circle struck from a center at the middle of the coupling, the faces at the end of the project ing portion and the shoulder of the body portion also being curved on arcs ofthe same circle concentric with the faces of the head and socket hereinbefore referred to, and the face of the outer end of the head also being curved concentric with the curves hereinbe fore referred to.

4:. A coupling formed of similar parts each comprising a body portion, a projectingportion of half the thickness of the body, ahead at the end of the projecting portion havin its thickness disposed equally on each side 0 the plane of the face of the projecting portion, a socket formed in the bod adjacent the projecting portion to recelve the head of the other part of the coupling, the inwardly directed face of the head and the corresponding face of the socket being curved substantially on arcs of the same circle struck from a center at the middle of the coupling, the faces at the end of the projecting portion and the shoulder of the body portion also being curved on arcs of the same circle concentric with the faces of the head and socket hereinbefore referred to, the face of the outer end of the head also being'curved concentric with the curves hereinbefore referred to and the face of the inner wall of the socket being flat.

Toronto, this 18 day of Feb. 1913.

GEORGE A. QUIN.

Signed in the presence ofi J. EDW. MAYBEE,

D. S. TOVELL. 

